From the [Menu], I pressed [Import File] , selected [DropBox], selected target WAV file with selected track number. The meter was moving, but after all nothing has NOT completed. I tried a couple of times.

I could import WAV file through iTunes without any problems.

Mixdown to Dropbox seems to be fine.

Formerly when I tried the Import through Dropbox, I did not face any problems. I recently upgrade my Auria Pro into v.2.11. Did it affect?

That is strange, I see that tapping on the DropBox logo just asks you to only log in now even when you are already signed in. It didn't used to be like that.

Have you tried importing different Wav files from DropBox into your session to see if it's an issue with just your one file?
Or a new Auria project to make sure there is no issue with your current session?

Like I said, it doesn't seem to be an Auria issue as my importing is working well across all file formats.

It looks like if you are already logged into DropBox and then open the DropBox log in window (by tapping the DropBox icon in the Auria Settings) and simply tap on 'Cancel' it will log you out. You will be sent automatically to the 'Import File' screen and if you tap on the 'DropBox' tab, you will be prompted to log in again.

I spent literally an hour trying to import a track from Dropbox using the Menu->Import File option. I rebooted the iPad multiple times. Tried copying the project and importing from the new copy. Nothing worked.

I finally found the workaround: open Dropbox and select the file that you want to import. Tap on the 3 dots in the upper right-hand corner of the screen. Select Export->Open In->Import with Auria. That will save your WAV file locally to Auria and then you're good to go.

Sooo... what I posted above may not always be the workaround, because now I can't import other files that I need to work with. I've rebooted the iPad a few times and tried my above solution which subsequently didn't work. This is frustrating, guys.